Metadata Manager uses OBIEE web services to extract metadata from OBIEE. As a result, you must enable OBIEE web services. OBIEE web services is available to licensed users of OBIEE. The OBIEE installer generates the appropriate licensing entries in the analyticsweblicense.xml file based on the installation key.
To verify that OBIEE web services are enabled, check that the kmsgLicenseSOAPAccess entry exists in the following file:
<OBIEE home directory>\web\config\analyticsweblicense.xml